Improvement in whiffletree-plates



B. SQPQRTER. Whifletree-Plate.

No. 210,557. IPatented Dec. 3,1878.

UNITED STATES PATENT OFFICE.

BENJAMIN S. PORTER, OF OTTAWA,y ILLINOIS, ASSIGNOR TO JAMES G. ENGLISH AND EDWIN F. MERSIOK, OF NEW HAVEN, CONN.

IMPROVEMENT IN'WHLIFFLETREE-PLATES.

Specification forming part of Letters Patent No. 210,557, dated December 3, 1878 application filed November 14, 1878.

To all lwhom it may concern:

Beit known that I, BENJAMIN S. PORTER, of Ottawa, in the county of La Salle and State of Illinois, have invented certain new and useful Improvements in Whifletree Plates, of which the following` is a specification:

As hitherto constructed, the lockingfplates for Whiftletrees are adapted to be placed and kept in Working position by turning the Whittletree through a quartercircle, by means of quarter-circle lianges, forming double locks on opposite sides of the bolt, for holding the parts together in the event of the accidental breaking or loss ofthe bolt.

My improved lock-plates are adapted to Work With half-circle ian ges, forming a single lock on one side of the bolt, which holds the plates together with greater security, gives greater bearing-surface, and can only be separated by turning the whiiiletree completely around-that is, end for end.

The shaft-bar plate has a central hub with a half-circle ange on 011e side and a hub-collar termination, which tits into and forms a bushing for the eye of the whiftletree plate, and through which the confining-bolt passes, so that there is no wear on the bolt at this point.

Referring to the drawings, Figure 1 represents a side elevation of the whietree and shaftbar united by my improved lockingplates; Fig. 2, a cross section of the same,

and Fig. 3 the lock of the shaft-bar plate and the lock-plate of the whifiletree separated.

The shaft-bar plate A has a central hub, a; With a semicircular flange, b, formed on one side, and a central collar termination, c. The Whiftletree-plate B has a circular rim, d, with a semicircularllange, c, formed on one side, extending toward the center. The shoulders or ends ofthe lauges b and c pass each other in placing the plates together, and the iian ge b will be in the open rim-space f, with the hub collar c ttin g as a bushing in the eye g ot' the upper plate, B, and extending entirely through it. The bolt C passes through from the top of the whiffletree to the bottom of the shaft-bar, and is secured by a nut and a jamplate.

In placing the Whitlletree in working position, it is turned entirely around, end for end, upon the plate A, bringing the hub-flange b on the same side of and above the rim ange e, so that in the event of the accidental loss or breaking of the bolt the plates could not be separated without turning the whitletree completely around, end for end. This advantage is obtained by the arrangement of the half-circle anges of each plate 011 one side only of the bolt, so that when interlocked they will both be on one side of the bolt, as in Fig. 2, and form a single halfcircle lock, as contradistinguished `from a double quarter circle lock.

By this construction greater wearing surface, easier movement, and greater security are obtained, While the bushing formed by the hub-collar prevents all Wear ot' the bolt in the whiietree-plate eye. The plates are secured lin position by screws. y

The device can be used with a double-tree, and the positions of the plates may be reversed from those stated.

I claimrIhe improved whifetree lock-plates, con sisting of the part A, having the hub a., provided with the semicircular iiange b, and the collar c outside of said ange, and the part B, having the circular rim d, the semicircular flange e, and the collarreceiving opening g, all constructed and adapted to form a continuous half-circle bearing and a single lock on one side of the bolt, requiring a complete turn of the whiftlet-ree, end for end, to separate said half-circle lock.

In testimony whereof I have hereunto set my hand in the presence of two witnesses.

BENJAMIN S. PORTER.

Witnesses:

P. TALBOT, WILL. F. NEELY. 

